Bo Xu

China University of Geosciences (Beijing)

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Zengqian Hou

Chinese Academy of Geological Sciences

Yuanchuan Zheng

China University of Geosciences (Beijing)

William L. Griffin

Macquarie University

Zhuang Miao

China University of Geosciences (Beijing)

Suzanne Y. O′Reilly

ARC Centre of Excellence for Core to Crust Fluid Systems

Yi Zhao

China University of Geosciences (Beijing)

Rui Wang

China University of Geosciences (Beijing)

Zengqian Hou

Chinese Academy of Geological Sciences

Chang‐da Wu

Chinese Academy of Geological Sciences

Lei Gao

University of Science and Technology of China

Cooperative Institutions

China University of Geosciences (Beijing)

110

Chinese Academy of Sciences

Chinese Academy of Geological Sciences

China University of Geosciences

Ministry of Natural Resources

University of Chinese Academy of Sciences

ARC Centre of Excellence for Core to Crust Fluid Systems

China Geological Survey

Institute of Geology and Geophysics

Peking University

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Science China Earth Sciences (2012)

Lei Wu Ancheng Xiao Liqun Wang Liguang Mao Liang Wang

Conglomerate

Echelon formation

10.1007/s11430-012-4402-7

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Citations (51)

Eastward growth of Tibetan Plateau controlled by Cenozoic Indian slab tearing

Zenodo (CERN European Organization for Nuclear Research) (2023)

Zengqian Hou Lijun Liu Haijiang Zhang Bo Xu Qingfei Wang

The file contains the P-wave velocity model and related plotting scripts for the manuscript entitled " Eastward growth of Tibetan Plateau controlled by Cenozoic Indian slab tearing". The P wave velocity model is stored in Vp.xyz, it contains four columns, which are longitude, latitude, depth (unit: km) and velocity perturbation relative to AK135 model, respectively. The plotting scripts are stored at " Figure1(b)" and "Figure2", which are used to plot figure 1(b) and figure 2 in the manuscript.

Slab

Tearing

10.5281/zenodo.10427924

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Citations (0)

Planktic foraminifera of the upper Barremian–Aptian black shale intervals from the Chaqiela section (Gamba, southern Tibet): Biostratigraphic and palaeoenvironmental implications

Cretaceous Research (2021)

Peiyue Fang Hui Luo Bo Xu Brian T. Huber Youhua Zhu

Aptian

Biozone

Chemostratigraphy

Siliciclastic

Cenomanian

10.1016/j.cretres.2021.104934

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Citations (15)

Identifying recycled oceanic components and volatiles in the Lizhuang carbonatite-associated REE deposit in southwest China: New constrain from in situ Hf–O isotopes

Ore Geology Reviews (2024)

Zhuang Miao Bo Xu Zengqian Hou Zhidan Zhao

Carbonatite-associated rare earth element (REE) deposits (CARD) are mainly found at the edges of cratons in the rift or post-collisional settings, but only a minority carbonatite can form large to giant REE deposit. Fluids rich in volatiles (such as F, Cl, S) are critical for the extraordinary enrichment of REE, but the manner in which volatiles and REE concentrate in the mantle source of CARD remains unclear. This study focuses on the Lizhuang syenite from the Mianning–Dechang REE belt, southwest China, to investigate its petrogenesis, source characteristics, and volatiles evolution, through in situ Hf–O isotope analysis, coupled with mineral chemistry, bulk-rock geochemistry, and geochronology. The Lizhuang syenite was generated in a post-collisional setting at about 27 Ma, resulting from partial melting of an enriched lithospheric mantle, followed by fractional crystallization and immiscibility. When contrasted with barren carbonatite-syenite complexes worldwide, the syenite in REE deposit has a relatively higher content of F and S, with no significant difference in Cl content, and there is no clear correlation between magma oxygen fugacity and REE mineralization. The Hf–O isotopic signatures of zircon and apatite, along with bulk-rock Sr–Nd isotopic modeling, reveal that the mantle source of the Mianning–Dechang CARD experienced metasomatic processes related to the melts/fluids derived from both marine sediments and altered oceanic crust during subduction. The cratonic root, enriched in volatiles and REE, is reactivated during the upwelling of asthenosphere, and the released volatiles are able to participate in the formation of CARD.

Carbonatite

Metasomatism

Asthenosphere

Petrogenesis

Rare-earth element

Fractional crystallization (geology)

Isotopic signature

10.1016/j.oregeorev.2024.105872

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Citations (3)

Late Anisian radiolarian assemblages from the Yarlung‐Tsangpo Suture Zone in the Jinlu area, Zedong, southern Tibet: Implications for the evolution of Neotethys

Island Arc (2019)

Dishu Chen Hui Luo Xueheng Wang Bo Xu Atsushi Matsuoka

Abstract Abundant Triassic radiolarian fossils were obtained from varicolored bedded cherts exposed in the Buruocang section near Jinlu village, Zedong, southern Tibet. The radiolarian‐bearing rocks represent fragmented remnants of the Neotethys oceanic sediments belonging to the mélange complex of the east part of the Yarlung‐Tsangpo Suture Zone. Two new middle Late Anisian radiolarian assemblages recognized from this section named Oertlispongus inaequispinosus and Triassocampe deweveri , respectively, are compared with those known from Europe, Far East Russia, Japan, and Turkey. These Anisian radiolarian fossils are the first reported in southern Tibet and the oldest radiolarian record within the Yarlung‐Tsangpo Suture Zone. They improve time constraints for the evolution of Neotethys in southern Tibet.

Radiolaria

10.1111/iar.12302

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Citations (41)

Cenozoic fault systems in southwest Qaidam Basin, northeastern Tibetan Plateau: Geometry, temporal development, and significance for hydrocarbon accumulation

AAPG Bulletin (2014)

Lei Wu Ancheng Xiao Dade Ma LI Hong-ge Bo Xu

We present a detailed structural analysis of geometry and temporal development of the Cenozoic faults in the southwestern part of the Qaidam Basin—the largest petroliferous sedimentary basin and the only one producing oil and gas within the Tibetan Plateau, northwest China—based on three-dimensional (3D) seismic and well-log data. The Cenozoic faults are mostly steep (50–70°), basement-involved reverse faults trending primarily west-northwest and secondarily north–south. The two fault sets are commonly linked to each other by west-northwest-oriented faults bending either southward at their eastern tips or northward at the western tips, and originated possibly from inversion of pre-existing extensional faults in response to the far-field effect of the Cenozoic India–Eurasia collision. Faults or fault segments active during different time periods were identified from isopach maps and verified via seismic reflection profiles, showing that the faults became active as early as the Paleocene in the southern part of the southwest Qaidam Basin and propagated dominantly northward and subordinately eastward over time. Measurement of throws on major faults indicates that fault activity intensified over time and culminated since the mid-Miocene. These faults have been an important factor in forming the oil fields in the southwest Qaidam Basin by improving permeability, forming anticlinal traps, and acting as conduits for oil migrating from source rocks to the reservoirs.

Hydrocarbon exploration

10.1306/11131313087

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Citations (57)

An enhanced chemical maturation of juvenile arc crust recorded by the Urad Houqi intrusive suite in Langshan arc, Central Asia

Geological Society of America Bulletin (2024)

Min Liu Shaocong Lai Shuai Ma Fangyi Zhang Ren‐Zhi Zhu

Abstract Continental arc magmatism is crucial in producing juvenile continental crust of andesitic to dacitic composition, yet its impact on the formation of the modern mature continental crust, which is more enriched in potassic and granitic components, remains poorly understood. We examined a suite comprised of norite gabbro, gabbroic diorite, high-Mg diorite, dioritic enclave, and medium-K to high-K granites (the Urad Houqi suite) from the Langshan arc in the southern Central Asian Orogenic Belt (CAOB). Zircon U-Pb geochronology indicates that the Urad Houqi suite was formed ca. 278–268 Ma by a continuous magmatic event, marking the final episode of the late Paleozoic continental arc magmatism in the southern CAOB induced by the subduction of the Paleo-Asian Ocean. The suite exhibits a more potassic and fertile composition compared to typical continental arc magmas, and shows a continuous increasing K2O/Na2O ratio and incompatible element concentrations, including K, Rb, Th, and U, with increasing SiO2 content. The geochemical evolution of the suite offers valuable insights into the maturation process of the juvenile arc crust. By combining zircon Hf and bulk-rock Sr-Nd-Pb isotope studies, we demonstrated that the various lithologies within the Urad Houqi suite recorded a three-stage enhancement of the geochemical fertility of the juvenile Langshan arc crust: (1) generation of the initially fertile primary melt from the mantle wedge metasomatized by the recycled subducted sediments; (2) trans-crustal open-system hybridization processes, including peritectic reaction and magma mixing, that further fertilized the derived melts in addition to fractional crystallization; and (3) diverse petrogenetic processes that contributed to the fertility of the granitic magmas, including polybaric fractionation of the primary magma, anatexis of ancient crust, and extraction of high-silica melts from the shallow mush system. The three-stage maturation of the juvenile Langshan arc crust was typically coupled with the accelerated subduction of the Paleo-Asian Ocean since the earliest Permian. Our study finds that the Urad Houqi suite can serve as an example of modern continental crust maturation at continental arc settings.

Diorite

Continental arc

Fractional crystallization (geology)

10.1130/b37465.1

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Citations (1)

Zircon xenocryst geochronology and implications for the Lhasa terrane evolution: Insights from Cenozoic volcanic rocks (Coqen, Tibet)

Journal of Asian Earth Sciences (2023)

Yufei Zhang Bo Xu Zengqian Hou Yi Zhao Zixuan Wang

Geochronology

Basement

10.1016/j.jseaes.2023.105763

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Citations (1)

Southward trench migration at ∼130–120 Ma caused accretion of the Neo-Tethyan forearc lithosphere in Tibetan ophiolites

Earth and Planetary Science Letters (2016)

Qing Xiong William L. Griffin Jian-Ping Zheng Suzanne Y. O′Reilly Norman J. Pearson

Asthenosphere

Geochronology

10.1016/j.epsl.2016.01.014

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Citations (121)

Geology and genesis of auriferous porphyritic monzogranite and its correlation with the Qiyugou porphyry-breccia system in East Qinling, Central China

Ore Geology Reviews (2022)

Li Tang Pei-Lin Chen M. Santosh Shouting Zhang Bo Xu

The Qiyugou deposit in the Qinling Orogenic Belt includes breccia pipe hosted gold mineralization and newly discovered porphyry gold mineralization, whereas the genetic relationship between porphyry stocks, stockwork-disseminated mineralization and breccia pipe-hosted mineralization remains obscure. Here we present the results from an integrated field investigation, petrography, whole-rock geochemistry, zircon U-Pb geochronology, trace elements and Hf-O isotopes on a suite of porphyritic monzogranite from the newly discovered auriferous '191 pluton', to elucidate the petrogenesis, magma source, timing of magmatic-hydrothermal event and the possible genetic link with the Qiyugou porphyry-breccia system. The porphyritic monzogranite shows varying degree of hydrothermal alterations including potassic alteration, phyllic alteration, silicification, sericitization and chloritization, resulting in the high loss on ignition values (LOI = 2.88–6.64 wt%) and linear relationships between LOI and large ion lithophile elements (LILEs) which suggest element mobility in fluids. The fluid immobile high field strength elements (HFSEs) and zircon trace elements indicate that the porphyritic monzogranite is typical I-type granite. Zircon U-Pb dating of the porphyritic monzogranites yield weighted mean ages of 136.4 ± 1.1 Ma, 134.6 ± 1.8 Ma and 135.2 ± 1.1 Ma, representing the emplacement age of the auriferous '191 pluton'. Zircon Hf-O isotopes show εHf(t) values from −25.6 to −20.0 with crustal model ages ranging from 2807 to 2458 Ma, and δ18O values from 4.75‰ to 5.66‰, indicating that the parental magma involved mixing between the partially melted Taihua Group lithologies and mantle-derived component. The available geochronological data constrain the timing and duration of magmatic-hydrothermal activities in the Qiyugou deposit, including pre-mineralization 158.7–150.1 Ma granitic magmatism, syn-mineralization 136.4–128.6 Ma porphyry magmatism and Au mineralization, and post-ore 128.9–124.7 Ma granitic dyke intrusion. The duration of the magmatic-hydrothermal activity in the Qiyugou deposit ranges between 136.4 Ma and 128.6 Ma, when the breccia pipes and granitoid plutons formed through multiple pulses of magma emplacement and fluid exsolution from a fertile magma chamber. The 136.4–131.3 Ma porphyry magmatism and gold mineralization in the '191 pluton' represent an early stage magmatic-hydrothermal activity in the Qiyugou porphyry-breccia system. We predict that the deeper levels of the breccia pipes could be potential target for porphyry gold ore bodies in the Qiyugou deposit.

Porphyritic

Breccia

Petrogenesis

Igneous differentiation

Geochronology

10.1016/j.oregeorev.2022.104709

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Citations (7)